﻿<!DOCTYPE HTML>
<html lang="en-US">
<head>
	<meta charset="UTF-8">
	<title>使用动态伪类选择器美化按钮</title>
	<style type="text/css">
		.download-info {
			text-align: center;
		}
		/*默认状态下的按钮效果*/
		.btn {
			background-color: #0074cc;
			*background-color: #0055cc;
			background-image: -ms-linear-gradient(top, #0088cc, #0055cc);
			background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#0088cc), to(#0055cc));
			background-image: -webkit-linear-gradient(top, #0088cc, #0055cc);
			background-image: -o-linear-gradient(top, #0088cc, #0055cc);
			background-image: -moz-linear-gradient(top, #0088cc, #0055cc);
			background-image: linear-gradient(top, #0088cc, #0055cc);
			background-repeat: repeat-x;
			display: inline-block;
			*display: inline;
			border: 1px solid #cccccc;
			*border: 0;
			border-color: #ccc;
			border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
			border-radius: 6px;
			color: #ffffff;
			cursor: pointer;
			font-size: 20px;
			font-weight: normal;
			filter: progid:dximagetransform.microsoft.gradient(startColorstr='#0088cc', endColorstr='#0055cc', GradientType=0);
			filter: progid:dximagetransform.microsoft.gradient(enabled=false);
			line-height: normal;
			padding: 14px 24px;
			text-align: center;
			text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);
			text-decoration: none;
			vertical-align: middle;
			*zoom: 1;
		}
		/*悬浮状态下按钮效果*/	
		.btn:hover {
			background-position: 0 -15px;
			background-color: #0055cc;
			*background-color: #004ab3;
			color: #ffffff;
			text-decoration: none;
			text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);
			-webkit-transition: background-position 0.1s linear;
			-moz-transition: background-position 0.1s linear;
			-ms-transition: background-position 0.1s linear;
			-o-transition: background-position 0.1s linear;
			transition: background-position 0.1s linear;
		}
		/*点击时按钮效果*/
		.btn:active {
			background-color: #0055cc;
			*background-color: #004ab3;
			background-color: #004099 \9;
			background-image: none;
			outline: 0;
			box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.15), 0 1px 2px rgba(0, 0, 0, 0.05);
			color: rgba(255, 255, 255, 0.75);
		}
		/*获得焦点按钮效果*/
		.btn:focus {
			outline: thin dotted #333;
			outline: 5px auto -webkit-focus-ring-color;
			outline-offset: -2px;
		}
	</style>
</head>
<body>
	<div class="download-info">
		<a href="#" class="btn">View project on GitHub</a>
	</div>
</body>
</html>